[Qemu-devel] [PATCH 19/26] qapi: Convert query-status

[Luiz Capitulino <lcapitulino@redhat.com>]

Please, note that the RunState type as defined in sysemu.h and its
runstate_as_string() function are being dropped in favor of the
RunState type generated by the QAPI.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
 hmp.c            |   19 +++++++++++++++
 hmp.h            |    1 +
 monitor.c        |   41 +--------------------------------
 qapi-schema.json |   67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 qmp-commands.hx  |    6 +++++
 sysemu.h         |   19 +--------------
 vl.c             |   32 +++++++++-----------------
 7 files changed, 106 insertions(+), 79 deletions(-)

diff --git a/hmp.c b/hmp.c
index 94a7f74..30925b0 100644
--- a/hmp.c
+++ b/hmp.c
@@ -53,3 +53,22 @@ void hmp_info_kvm(Monitor *mon)
     qapi_free_KvmInfo(info);
 }
 
+void hmp_info_status(Monitor *mon)
+{
+    StatusInfo *info;
+
+    info = qmp_query_status(NULL);
+
+    monitor_printf(mon, "VM status: %s%s",
+                   info->running ? "running" : "paused",
+                   info->singlestep ? " (single step mode)" : "");
+
+    if (!info->running && info->status != RUN_STATE_PAUSED) {
+        monitor_printf(mon, " (%s)", RunState_lookup[info->status]);
+    }
+
+    monitor_printf(mon, "\n");
+
+    qapi_free_StatusInfo(info);
+}
+
diff --git a/hmp.h b/hmp.h
index a93ac1f..df4242f 100644
--- a/hmp.h
+++ b/hmp.h
@@ -20,5 +20,6 @@
 void hmp_info_name(Monitor *mon);
 void hmp_info_version(Monitor *mon);
 void hmp_info_kvm(Monitor *mon);
+void hmp_info_status(Monitor *mon);
 
 #endif
diff --git a/monitor.c b/monitor.c
index da729ce..e68f2e2 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2550,36 +2550,6 @@ static int do_inject_nmi(Monitor *mon, const QDict *qdict, QObject **ret_data)
 }
 #endif
 
-static void do_info_status_print(Monitor *mon, const QObject *data)
-{
-    QDict *qdict;
-    const char *status;
-
-    qdict = qobject_to_qdict(data);
-
-    monitor_printf(mon, "VM status: ");
-    if (qdict_get_bool(qdict, "running")) {
-        monitor_printf(mon, "running");
-        if (qdict_get_bool(qdict, "singlestep")) {
-            monitor_printf(mon, " (single step mode)");
-        }
-    } else {
-        monitor_printf(mon, "paused");
-    }
-
-    status = qdict_get_str(qdict, "status");
-    if (strcmp(status, "paused") && strcmp(status, "running")) {
-        monitor_printf(mon, " (%s)", status);
-    }
-
-    monitor_printf(mon, "\n");
-}
-
-static void do_info_status(Monitor *mon, QObject **ret_data)
-{
-    *ret_data = qobject_from_jsonf("{ 'running': %i, 'singlestep': %i, 'status': %s }", runstate_is_running(), singlestep, runstate_as_string());
-}
-
 static qemu_acl *find_acl(Monitor *mon, const char *name)
 {
     qemu_acl *acl = qemu_acl_find(name);
@@ -2979,8 +2949,7 @@ static const mon_cmd_t info_cmds[] = {
         .args_type  = "",
         .params     = "",
         .help       = "show the current VM status (running|paused)",
-        .user_print = do_info_status_print,
-        .mhandler.info_new = do_info_status,
+        .mhandler.info = hmp_info_status,
     },
     {
         .name       = "pcmcia",
@@ -3162,14 +3131,6 @@ static const mon_cmd_t qmp_query_cmds[] = {
         .mhandler.info_new = do_pci_info,
     },
     {
-        .name       = "status",
-        .args_type  = "",
-        .params     = "",
-        .help       = "show the current VM status (running|paused)",
-        .user_print = do_info_status_print,
-        .mhandler.info_new = do_info_status,
-    },
-    {
         .name       = "mice",
         .args_type  = "",
         .params     = "",
diff --git a/qapi-schema.json b/qapi-schema.json
index 641f12d..0e59c71 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -85,3 +85,70 @@
 ##
 { 'command': 'query-kvm', 'returns': 'KvmInfo' }
 
+##
+# @RunState
+#
+# An enumation of VM run states.
+#
+# @debug: QEMU is running on a debugger
+#
+# @inmigrate: guest is paused waiting for an incoming migration
+#
+# @internal-error: An internal error that prevents further guest execution
+# has occurred
+#
+# @io-error: the last IOP has failed and the device is configured to pause
+# on I/O errors
+#
+# @paused: guest has been paused via the 'stop' command
+#
+# @postmigrate: guest is paused following a successful 'migrate'
+#
+# @prelaunch: QEMU was started with -S and guest has not started
+#
+# @finish-migrate: guest is paused to finish the migration process
+#
+# @restore-vm: guest is paused to restore VM state
+#
+# @running: guest is actively running
+#
+# @save-vm: guest is paused to save the VM state
+#
+# @shutdown: guest is shut down (and -no-shutdown is in use)
+#
+# @watchdog: the watchdog action is configured to pause and has been triggered
+##
+{ 'enum': 'RunState',
+  'data': [ 'debug', 'inmigrate', 'internal-error', 'io-error', 'paused',
+            'postmigrate', 'prelaunch', 'finish-migrate', 'restore-vm',
+            'running', 'save-vm', 'shutdown', 'watchdog' ] }
+
+##
+# @StatusInfo:
+#
+# Information about VCPU run state
+#
+# @running: true if all VCPUs are runnable, false if not runnable
+#
+# @singlestep: true if VCPUs are in single-step mode
+#
+# @status: the virtual machine @RunState
+#
+# Since:  0.14.0
+#
+# Notes: @singlestep is enabled through the GDB stub
+##
+{ 'type': 'StatusInfo',
+  'data': {'running': 'bool', 'singlestep': 'bool', 'status': 'RunState'} }
+
+##
+# @query-status:
+#
+# Query the run status of all VCPUs
+#
+# Returns: @StatusInfo reflecting all VCPUs
+#
+# Since:  0.14.0
+##
+{ 'command': 'query-status', 'returns': 'StatusInfo' }
+
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 9f9751d..afa95bd 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1609,6 +1609,12 @@ Example:
 <- { "return": { "running": true, "singlestep": false, "status": "running" } }
 
 EQMP
+    
+    {
+        .name       = "query-status",
+        .args_type  = "",
+        .mhandler.cmd_new = qmp_marshal_input_query_status,
+    },
 
 SQMP
 query-mice
diff --git a/sysemu.h b/sysemu.h
index 5d1fed2..a889d90 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -6,27 +6,11 @@
 #include "qemu-option.h"
 #include "qemu-queue.h"
 #include "qemu-timer.h"
+#include "qapi-types.h"
 #include "notify.h"
 
 /* vl.c */
 
-typedef enum {
-    RUN_STATE_DEBUG,          /* qemu is running under gdb */
-    RUN_STATE_INMIGRATE,     /* paused waiting for an incoming migration */
-    RUN_STATE_INTERNAL_ERROR,       /* paused due to an internal error */
-    RUN_STATE_IO_ERROR,       /* paused due to an I/O error */
-    RUN_STATE_PAUSED,         /* paused by the user (ie. the 'stop' command) */
-    RUN_STATE_POSTMIGRATE,   /* paused following a successful migration */
-    RUN_STATE_PRELAUNCH,     /* qemu was started with -S and haven't started */
-    RUN_STATE_FINISH_MIGRATE,    /* paused preparing to finish migrate */
-    RUN_STATE_RESTORE_VM,        /* paused restoring the VM state */
-    RUN_STATE_RUNNING,        /* qemu is running */
-    RUN_STATE_SAVE_VM,         /* paused saving VM state */
-    RUN_STATE_SHUTDOWN,       /* guest shut down and -no-shutdown is in use */
-    RUN_STATE_WATCHDOG,       /* watchdog fired and qemu is configured to pause */
-    RUN_STATE_MAX
-} RunState;
-
 extern const char *bios_name;
 
 extern const char *qemu_name;
@@ -38,7 +22,6 @@ void runstate_init(void);
 bool runstate_check(RunState state);
 void runstate_set(RunState new_state);
 int runstate_is_running(void);
-const char *runstate_as_string(void);
 typedef struct vm_change_state_entry VMChangeStateEntry;
 typedef void VMChangeStateHandler(void *opaque, int running, RunState state);
 
diff --git a/vl.c b/vl.c
index ba4a151..dbf7778 100644
--- a/vl.c
+++ b/vl.c
@@ -147,6 +147,7 @@ int main(int argc, char **argv)
 #include "qemu-config.h"
 #include "qemu-objects.h"
 #include "qemu-options.h"
+#include "qmp-commands.h"
 #ifdef CONFIG_VIRTFS
 #include "fsdev/qemu-fsdev.h"
 #endif
@@ -375,22 +376,6 @@ static const RunStateTransition runstate_transitions_def[] = {
 
 static bool runstate_valid_transitions[RUN_STATE_MAX][RUN_STATE_MAX];
 
-static const char *const runstate_name_tbl[RUN_STATE_MAX] = {
-    [RUN_STATE_DEBUG] = "debug",
-    [RUN_STATE_INMIGRATE] = "incoming-migration",
-    [RUN_STATE_INTERNAL_ERROR] = "internal-error",
-    [RUN_STATE_IO_ERROR] = "io-error",
-    [RUN_STATE_PAUSED] = "paused",
-    [RUN_STATE_POSTMIGRATE] = "post-migrate",
-    [RUN_STATE_PRELAUNCH] = "prelaunch",
-    [RUN_STATE_FINISH_MIGRATE] = "finish-migrate",
-    [RUN_STATE_RESTORE_VM] = "restore-vm",
-    [RUN_STATE_RUNNING] = "running",
-    [RUN_STATE_SAVE_VM] = "save-vm",
-    [RUN_STATE_SHUTDOWN] = "shutdown",
-    [RUN_STATE_WATCHDOG] = "watchdog",
-};
-
 bool runstate_check(RunState state)
 {
     return current_run_state == state;
@@ -419,15 +404,20 @@ void runstate_set(RunState new_state)
     current_run_state = new_state;
 }
 
-const char *runstate_as_string(void)
+int runstate_is_running(void)
 {
-    assert(current_run_state < RUN_STATE_MAX);
-    return runstate_name_tbl[current_run_state];
+    return runstate_check(RUN_STATE_RUNNING);
 }
 
-int runstate_is_running(void)
+StatusInfo *qmp_query_status(Error **errp)
 {
-    return runstate_check(RUN_STATE_RUNNING);
+    StatusInfo *info = g_malloc0(sizeof(*info));
+
+    info->running = runstate_is_running();
+    info->singlestep = singlestep;
+    info->status = current_run_state;
+
+    return info;
 }
 
 /***********************************************************/
-- 
1.7.7.rc0.72.g4b5ea